By the sixth century BC, Greeks had discovered that poisoning wine was an excellent way to get rid of their enemies.
And so to reassure guests at a social function, it became necessary for the host to take the first drink.
The Romans added a piece of burnt bread, or “tostus,” to the custom because it absorbed acid, making the wine more pleasant to drink.
Flattering words were also spoken during the toasting ceremony to reassure the guests of their safety.
